Grinding mechanism.



No. 794.375. PATENTED JULY 11, 1905.

J.` NAZEL. GRINDING MEGHANISM.

APPLIGATION FILED JAN. 21, 1905.

3 SHEETS-SHEET 1.

18 Mfinesses.-

. PATENTED JULY 1l, 1905.

J. NAZBL.

GRINDING MEGHANISM.

APPLICATION FILED JAN. 21, 1905.

3 SHEETS-SHEET 2.

No. 794.375. I PATENTED JULY 11, 1905.

J. NAZBL.

GRINDING MEGHANISM.

APPLICATION FILED JAN. 21, 1905.

3 SHEETS-SHEET 3.

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Patented July 11, 1905.

AinNT @trice JOHN NAZEL, OF PHILADELPHIA, PENNSYLVANIA.

GRINDING IVIECHANlSlVl.

SPECIFICATION forming part of Letters Patent No. 794,375, dated July 11,1905.

Application filed January 2l, 1905. Serial No. 242,053.

To @ZZ wiz/071i, zit may concern:

Be it known that I, JOHN NAZEL, a citizen of the United States. residingat Philadel phia, in the county of Philadelphia and State ofPennsylvania, have invented certain Improvements in Grinding Mechanism,of which the following is a specification.

This invention relates to mechanism for grinding cylindrical surfaces,and particularly the surfaces of glass cylinders that are used inbufiing operations. In buffing leather such cylinders are gripped byreciprocating devices which cause them to strike glancing blows upon theleather properly supported therefor, and the result of such operationsis to wear the cylindrical to plain or flat surfaces, which requirecorrection by grinding to restore the cylindrical configuration.

It is the chief purpose of my invention to provide mechanism forsupporting and manipulating such cylinders in relation to a grindingdevice coacting therewith, so that they can be manipulated and ground ina convenient and satisfactory manner.

rPhe nature and characteristic features of the improvements will appearby reference to the following description and the accompanying drawingsin illustration thereof, of which- Figure 1 represents a side elevationof a machine embodying my invention. Fig. 2 represents a plan View ofthe mechanism shown in Fig. 1. Fig. 3 represents an enlarged sectionalview taken on the line 3 3 of Fig. 2, illustrating roller mechanism forholding the cylinders during the grinding operations.

Fig. 4 represents a sectional view taken on the line 44 of Fig. 3. Fig.5 represents a face view of an upright for holding the rollersupports,and Fig. 6 represents a diagrammatic View of mechanism for driving therollers.

As shown in the drawings, the frame comprises the legs 1, which supportthe spiders 2 and 3. The spider 2 has the bearing-step 4, adjust-ablyheld therein for supporting the lower end of the vertical shaft 5, andthe spider 3 supports the bearing-step 6, having the upper end of theshaft journaled therein and supporting the hub 7, secured to thegrinding wheel or stone 8, which is revolved by a pulley 9, fixed on theshaft. The frame carries the uprights 10, having slots 1l, through whichbolts 12 are passed to hold them in vertically-adjustable relation tothe frame, and the slots 13, through which are passed bolts 14 forholding the roller-supports 15 in vertically-adjustable relation to theuprights.

Stationary bearings 16 of the roller-supports have journaled therein thespindle 17, which carries the rubber-covered roller 18. A rod 19,carried by the support, has journaled thereon the hanger 20, which isprovided with bearings 21, in which is journaled the rubber-coveredroller 23. A set-screw 24, movable in the bearing 25, bears against thehanger 2O to adjust and hold thel roller 23.

Astem 26, supported Akby the rod 19, projects upwardly through a shoe27, which is hinged by a rod 28 to bearings 29, the shoe having therubber-covered roller 30 journaled in the bearings 30' thereof. Abearing 3l is held on the stem 26 by a nut 32, and fulcrumed onthevbearing by the pivots 33 are the cams 34. These cams impinge uponthe shoe and have the handle 35, by which they are operated to regulatethe position thereof, the shoe being thrust upward by a coiled spring36, whereby the position of the roller 3() is regulated. Shafts 37 arecarried in bearings 38 and connected With the eccentric 39, fixed to thegrinding-wheel by the links 40. Fingers 41, held by set-screws 42 on theshafts 37, engage the ends of cylinders 43, which are carried by therubber-covered rollers, the rollers holding the surface of the cylinderin frictional contact with the grinding-surface of the wheel 8.

Sheaves 44, fixed on the shaft 5, drive the belts 45, which pass overthe sheaves 46, carried by the brackets 47 on the uprights 10, thenceover the sheaves 48 and 49, fixed to the respective spindles 17 and 22,and thence over the sheave 50, carried by the upright.

It Will be understood that by means of the adjustable connection of theuprights l() to the frame and the adjustable connection of the supports15 to the uprights the position of the rollers for holding the cylindersto be ground can readilyT be adjusted with relation to the stone, whilethe tightening of the belts 45 for driving the rollers can readily beeffected. As the positions of the rollers 23 and can readily be adjustedwith reference to the roller 18, it will be evident'that the cylindercan be supported Without centerings by the peripheral engagement ofthese rollers therewith in the desired relation to the grinding-wheelregardless of the size of the cylinders or the irregularities in itssurface.

In the operation of the device the wheel 8 and the rollers 18 and 22 arerevolved in synchronism, the rollers turning' the glass cylinders 43 ata definite rate relative to the revolution of the stone which is actingupon the surface or highest points of the surface of the cylinders, andsimultaneously with the revolution of the stone and the cylinders they,latter are reciprocated radially upon the surface of the stone throughits eccentric connection with the rods 37 and the lingers 4l. It will beunderstood that while but two sets of rollers are shown any convenientnumber of sets for holding any desired number of cylinders to be groundsimultaneously may be employed. As the grinding-wheel is revolved it ismaintained in proper grinding condition by supplying an abrasivematerial to the surface thereof and adding water thereto, while thesludge which is formed thereby and works over the edge of the wheel isdelivered by an apron 52 to a trough 53, carried by the frame.

Having described my invention, I claim- 1. A grindingmachine comprisinga revolving wheel and a series of rollers extending transversely to theaxis of said wheel for supporting an object to be ground so that saidobject is revolved upon said revolving wheel, substantially asspecified.

2. A grinding-machine comprising a revolving wheel, a series of rollersadapted for supporting' a cylinder with its axis disposedtransversely tothat of said wheel so that it revolves in Contact with said revolving wheel, means for adjusting said rollers to cylinders of differentdiameters, and means for driving one or more of said rollers,substantially as specified.

3. A grinding-machine comprising a revolvingI grinding-wheel, aseries ofrollcrs for revolubly supporting an object to be ground by said wheel,and means for reciprocating said object longitudinally as it revolves,substantially as specified.

4. Agrinding-machine comprisingagrinding-wheel, aseries of rollers forrevolubly supporting an object to be ground by the face of said wheel,and means connecting said Wheel with one or more of said rollers torevolve said parts in unison, substantially as specified.

5. Agrinding-machinc comprisingaframe, a grinding-wheel revolubl ysupported by said frame, a roller-support connected in adjustablerelation to said frame, a set of rollers revolubly mounted in saidsupport and adapted for revolubly supporting a cylinder' so as to bringits surface in contact with the face of said grinding-wheel, and meansfor revolving said grinding-wheel and cylinder in unison, substantiallyas specified.

6. Agrinding-machinecomprisingaframe, a grinding-wheel revolublysupported by said frame, a roller-support carried by said frame, and aseries of rollers journaled in said support and adapted for revolublysupporting an objeetto be ground in contact with said wheel, saidroller-support comprisinga hinged shoe having a roller journaled inbearings thereof and a stem for adjusting the position of said shoe andthe roller carried thereby, substantially as specified.

7. Agrinding-machine comprising agrinding device, a series of rollersfor revolubly supporting an object to be ground by said grinding device,a hinged support in which one of said rollers is journaled, and meansfor adjusting said hinged support and the position of the roller carriedthereby, substantially as specified.

8. A grinding-machine comprising a grinding device, a series of rollersfor revolubly supporting an object to be ground by said grinding device,a hinged support in which one of said rollers is journaled, aspring forsustaining said support, and a cam for adjusting said support and theroller carried thereby, substantially as specified.

9. Agrinding-machine comprising a grinding-wheel, a series of rollersfor revolubly supporting an object to be ground by said wheel, and areciprocating rod having means for engaging and shifting said object,substantially as specified.

10. A grinding-machine comprising a revolving vertical shaft, agrinding-wheel revolved by said shaft, a series of rollers extending`transversely to said shaft for supporting an object to be ground by saidwheel, and means for revolving' one or more of said rollers by saidshaft, substantially as specified.

In testimony whereof I have hereunto set my hand, this 19th day ofJanuary, A. D. 1905, in the presence of the subscribing witnesses.

JOHN NAZEL.

Vitnesses:

ROBERT JAMES EARLEY, U'rLEY E. CRANE, J r.

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